>>7648052I'd say heat, if only by reduction. People don't get get hurt by fast acceleration, but by rapid changes in acceleration. Falling through Earth would give a gradual start and stop, so that won't do anything.

If we assume we can drill a hole through Earth, then we can also fill it with oxygen. So that leaves heat. That could kill you.

>>7648989>If we assume we can drill a hole through Earth, then we can also fill it with oxygen.A hole big enough for a person to jump into would be incredibly massive. As you get farther down it will be like what happens when you go up really high, the air will get extremely thin.

>>7648037Assuming you don't crash into the walls of the tunnel, you would reach the other side, then get back, and etc... with a sinusoidal motion. A t the end you'll end up at the center of the earth.It would actually be a very efficient transportation system, but you have to drill...

>>7649323Air resistance? Eventually OP would slow down to the point that he or she will be irretrievably stuck in the centre of the planet. Either that or he or she suffocates over the 42 (?) minute journey.

>>7648037Assuming you drilled a diameter hole, right through the center of the Earth, and out the other side. And assuming that the heat would not kill you and that the hole was also a vacuum. Then if you jumped in, you would oscillate back and forth for eternity.

>>7648989>People don't get get hurt by fast acceleration, but by rapid changes in acceleration

When talking about the damaging effects of gravity to the body, it has nothing to do with the time derivative of the force, but rather the positional derivative of the force, also known as a tidal force (though it's not really a force). A fast change in acceleration applied equally throughout the body doesn't cause any damage. However, if the differences in force throughout the body are high enough, then damage will be caused. The tidal force caused by the Earth is relatively small because its mass is relatively low, a black hole, however, has a large enough tidal force to rip someone apart. Tidal forces fallout cubicly, which is why they don't affect us on Earth.

U could make elevator moving freely down to opposite side of the earth (if u consider some cylindrical wall around to do not melt in core). If we omit air resistance and earth irregularity (difference of height above sea level on both sides of tunel) elevator would stop exactly at the same height u made it going downward.

>>7649309The gravity at the center of the earth isn't infinite. You have to use a gravity sort of equivalent of Gauss's Law. Basically a sphere of mass with the radius of however far some the center you are is the mass pulling on you, when you're at the center, there's no pull at all because there's no mass beneath you.

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